they normally would, as if they were actually purchasingfor their consumption. The rationale for 12 items is that itis the mean average number of items bought on a supermarkettrip (Anic and Radas, 2006; Baron and Lock, 1995;Schmidt, 2012; Sorensen, 2011; Sorensen, 2012). While onlinebaskets tend to be larger than those in-store, it is alsolikely the case that new online shoppers will buy modest basketsizes initially. Also as infrastructure such as pick-uppoints grows with no delivery charges, smaller online shopsare likely to increase. Therefore, 12 items was consideredan appropriate shopping list.While purchasing online was unfamiliar to respondents, thetask – buying groceries – was quite realistic. The approachshould therefore provide a high degree of external validity. Respondentsdid not actually purchase the items, as this wouldhave involved them entering payment details during a processin which their activity was screen recorded. However, numerousstudies have successfully employed purchasing scenarios not involvingactual payment (e.g. Ehrenberg and England, 1990;Janiszewski and Cunha, 2004; Yang and Lynn, 2014).